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authorAaron Griffin <aaron@archlinux.org>2007-02-13 08:15:38 +0000
committerAaron Griffin <aaron@archlinux.org>2007-02-13 08:15:38 +0000
commit103dbb9fd14fde35e116819808e6d4c9b534eaa2 (patch)
tree05e1b6c6f4db530894c6e19694a846975ed6587f /lib/libalpm/conflict.c
parent3da9fb537a0711ee12f66421703e5529ea5fca6a (diff)
* Refactored conflict checking within packages. Profiling from Dan showed an
unbelievable amount of strcmp() calls (25 million) due to the list searching. This has been reimplemented with a set-intersection scheme, due to the fact that file lists are always ordered. - NEEDS TESTING * Minor clean up, "globalized" the str_cmp helper to match the alpm comparison signature, so we can use it elsewhere.
Diffstat (limited to 'lib/libalpm/conflict.c')
-rw-r--r--lib/libalpm/conflict.c72
1 files changed, 46 insertions, 26 deletions
diff --git a/lib/libalpm/conflict.c b/lib/libalpm/conflict.c
index 33ab6a43..ffc9dc68 100644
--- a/lib/libalpm/conflict.c
+++ b/lib/libalpm/conflict.c
@@ -209,9 +209,37 @@ alpm_list_t *_alpm_checkconflicts(pmdb_t *db, alpm_list_t *packages)
}
/* Returns a alpm_list_t* of file conflicts.
- *
- * adds list of files to skip to alpm_list_t** skip_list.
+ * Hooray for set-intersects!
+ * Pre-condition: both lists are sorted!
*/
+static alpm_list_t *chk_fileconflicts(alpm_list_t *filesA, alpm_list_t *filesB)
+{
+ alpm_list_t *ret = NULL;
+ alpm_list_t *pA = filesA, *pB = filesB;
+
+ while(pA && pB) {
+ const char *strA = pA->data;
+ const char *strB = pB->data;
+ if(strA[strlen(strA)-1] == '/') {
+ pA = pA->next;
+ } else if(strB[strlen(strB)-1] == '/') {
+ pB = pB->next;
+ } else if(strcmp(strA, strB) == -1) {
+ pA = pA->next;
+ } else if(strcmp(strB, strA) == -1) {
+ pB = pB->next;
+ } else {
+ ret = alpm_list_add(ret, strdup(strA));
+ pA = pA->next;
+ pB = pB->next;
+ }
+ }
+ for(alpm_list_t *i = ret; i; i = i->next) {
+ _alpm_log(PM_LOG_DEBUG, "found conflict = %s", i->data);
+ }
+ return(ret);
+}
+
alpm_list_t *_alpm_db_find_conflicts(pmdb_t *db, pmtrans_t *trans, char *root, alpm_list_t **skip_list)
{
alpm_list_t *i, *j, *k;
@@ -232,31 +260,23 @@ alpm_list_t *_alpm_db_find_conflicts(pmdb_t *db, pmtrans_t *trans, char *root, a
pmpkg_t *p1 = (pmpkg_t*)i->data;
percent = (double)(alpm_list_count(targets) - alpm_list_count(i) + 1) / alpm_list_count(targets);
PROGRESS(trans, PM_TRANS_PROGRESS_CONFLICTS_START, "", (percent * 100), alpm_list_count(targets), (alpm_list_count(targets) - alpm_list_count(i) +1));
- for(j = i; j; j = j->next) {
+ for(j = i->next; j; j = j->next) {
pmpkg_t *p2 = (pmpkg_t*)j->data;
- if(strcmp(p1->name, p2->name)) {
- for(k = p1->files; k; k = k->next) {
- filestr = k->data;
- if(filestr[strlen(filestr)-1] == '/') {
- /* has a trailing '/', so it's a directory -- skip it. */
- continue;
- }
- if(strcmp(filestr, ".INSTALL") == 0) {
+ alpm_list_t *conffiles = chk_fileconflicts(p1->files, p2->files);
+
+ if(conffiles) {
+ for(k = conffiles; k; k = k->next) {
+ pmconflict_t *conflict = malloc(sizeof(pmconflict_t));
+ if(conflict == NULL) {
+ _alpm_log(PM_LOG_ERROR, _("malloc failure: could not allocate %d bytes"),
+ sizeof(pmconflict_t));
continue;
}
- if(alpm_list_find_str(p2->files, filestr)) {
- pmconflict_t *conflict = malloc(sizeof(pmconflict_t));
- if(conflict == NULL) {
- _alpm_log(PM_LOG_ERROR, _("malloc failure: could not allocate %d bytes"),
- sizeof(pmconflict_t));
- continue;
- }
- conflict->type = PM_CONFLICT_TYPE_TARGET;
- STRNCPY(conflict->target, p1->name, PKG_NAME_LEN);
- STRNCPY(conflict->file, filestr, CONFLICT_FILE_LEN);
- STRNCPY(conflict->ctarget, p2->name, PKG_NAME_LEN);
- conflicts = alpm_list_add(conflicts, conflict);
- }
+ conflict->type = PM_CONFLICT_TYPE_TARGET;
+ STRNCPY(conflict->target, p1->name, PKG_NAME_LEN);
+ STRNCPY(conflict->file, k->data, CONFLICT_FILE_LEN);
+ STRNCPY(conflict->ctarget, p2->name, PKG_NAME_LEN);
+ conflicts = alpm_list_add(conflicts, conflict);
}
}
}
@@ -320,7 +340,7 @@ alpm_list_t *_alpm_db_find_conflicts(pmdb_t *db, pmtrans_t *trans, char *root, a
}
/* If it used to exist in there, but doesn't anymore */
if(dbpkg2 && !alpm_list_find_str(p1->files, filestr)
- && alpm_list_find_str(dbpkg2->files, filestr)) {
+ && alpm_list_find_str(dbpkg2->files, filestr)) {
ok = 1;
/* Add to the "skip list" of files that we shouldn't remove during an upgrade.
*
@@ -348,7 +368,7 @@ alpm_list_t *_alpm_db_find_conflicts(pmdb_t *db, pmtrans_t *trans, char *root, a
pmconflict_t *conflict = malloc(sizeof(pmconflict_t));
if(conflict == NULL) {
_alpm_log(PM_LOG_ERROR, _("malloc failure: could not allocate %d bytes"),
- sizeof(pmconflict_t));
+ sizeof(pmconflict_t));
continue;
}
conflict->type = PM_CONFLICT_TYPE_FILE;